91+ Built-in Developer Tools

Encode and decode between common formats used in web development, APIs, and data transfer.

• Base64 EncodeEncode any text to Base64 format.
• Base64 DecodeDecode Base64-encoded strings back to plain text.
• Base32 EncodeEncode text to Base32 (RFC 4648).
• Base32 DecodeDecode Base32 strings to plain text.
• URL EncodePercent-encode a string for safe use in URLs.
• URL DecodeDecode a percent-encoded URL string.
• URL ParserBreak a URL into protocol, host, path, query parameters, and fragment.
• JWT InspectorDecode a JWT and display header + payload as JSON — no secret required.
• JWT EncoderBuild and sign JWT tokens using HMAC HS256, HS384, or HS512.
• HTML EncodeConvert special characters to HTML entities.
• HTML DecodeConvert HTML entities back to characters.
• Hex to ASCIIConvert a hexadecimal byte string to ASCII text.
• ASCII to HexConvert ASCII text to hexadecimal representation.
• Backslash EscapeEscape special characters with backslash sequences.
• Backslash UnescapeRemove backslash escaping from a string.
• ROT13Apply or reverse the ROT13 cipher.
• ROT47Apply or reverse ROT47 (full printable ASCII range).
• Base64 Image DecodeDecode a Base64 data URI and display the embedded image.

Beautify, minify, and validate code and markup for readability or production.

• JSON FormatterPretty-print JSON with configurable indentation. Highlights syntax errors with line and column.
• JSON ValidateValidate JSON syntax and report exact error location.
• XML FormatterPretty-print and indent XML markup.
• XML MinifyRemove all whitespace from XML for compact transmission.
• SQL FormatterFormat SQL queries with proper keyword casing and indentation.
• CSS BeautifierIndent and format CSS stylesheets for readability.
• CSS MinifyRemove whitespace from CSS for production use.
• HTML BeautifierPretty-print and indent HTML markup.
• JS BeautifierFormat JavaScript and TypeScript code.
• JS MinifierMinify JavaScript for production bundles.
• JS ValidateValidate JavaScript syntax and report errors.
• Markdown PreviewLive split-pane Markdown editor with side-by-side rendered HTML.

Convert data between formats, time representations, number systems, and markup languages.

• JSON to CSVConvert a JSON array of objects to comma-separated values.
• JSON to TSVConvert a JSON array to tab-separated values.
• JSON to YAMLConvert JSON to YAML format.
• JSON to XMLConvert a JSON object to XML representation.
• YAML to JSONConvert YAML back to JSON.
• CSV to JSONParse CSV (with headers) to a JSON array of objects.
• XML to JSONConvert XML markup to a JSON representation.
• Markdown to HTMLConvert Markdown source to raw HTML.
• HTML to TextStrip HTML tags and extract clean readable text.
• HTML to JSXConvert HTML markup to React-compatible JSX syntax.
• JSON EscapeEscape a string for safe embedding inside a JSON value.
• JSON UnescapeUnescape JSON-encoded string escapes.
• Color ConverterConvert colors between HEX, RGB, HSL, and HSV.
• Number Base ConverterConvert integers between binary, octal, decimal, and hex.
• Unix TimestampConvert Unix timestamps to human-readable dates and vice versa.
• Date FormatterParse and reformat date strings across common locales and styles.
• Seconds to H:M:SConvert a number of seconds to hours:minutes:seconds.
• H:M:S to SecondsConvert H:M:S notation to total seconds.
• Decimal to RomanConvert a decimal integer to Roman numerals.
• Roman to DecimalConvert Roman numerals to a decimal integer.
• UUID ↔ HexConvert between standard UUID format and 32-character hex strings.

Generate random values, identifiers, hashes, and placeholder content on demand.

• UUID v4 GeneratorGenerate cryptographically random UUID v4 identifiers.
• ULID GeneratorGenerate Universally Unique Lexicographically Sortable Identifiers.
• Hash GeneratorCompute MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously.
• Random String GeneratorGenerate random strings with configurable alphabet and length.
• Random PasswordGenerate secure random passwords with configurable complexity.
• Lorem Ipsum GeneratorGenerate placeholder Latin text by word, sentence, or paragraph count.
• QR Code GeneratorGenerate QR codes from any URL or text, with PNG download.
• Random NumberGenerate random integers or decimals within a custom range.
• Random IP GeneratorGenerate random IPv4 addresses.
• Random MAC GeneratorGenerate random MAC addresses.

Analyse, query, and decode structured data to understand it at a deeper level.

• Regex TesterTest regular expressions against input and list all matches with positions.
• JSONPath EvaluatorEvaluate JSONPath expressions against JSON and display matching nodes.
• String InspectorView character, word, line, sentence, and byte statistics for any string.
• Cron Job ParserParse cron expressions in plain English with next N scheduled run times.
• Certificate DecoderDecode PEM X.509 certificates: subject, issuer, validity, public key, SANs.
• HTML PreviewLive preview HTML in a sandboxed iframe alongside the source editor.

Transform, analyse, and manipulate plain text lines and strings.

• LowercaseConvert all text to lowercase.
• UppercaseConvert all text to UPPERCASE.
• Title CaseCapitalise the first letter of every word.
• camelCaseConvert text to camelCase.
• PascalCaseConvert text to PascalCase.
• snake_caseConvert text to snake_case.
• kebab-caseConvert text to kebab-case.
• CONSTANT_CASEConvert text to CONSTANT_CASE.
• Invert CaseSwap the case of every character.
• Line SortSort lines alphabetically ascending or descending.
• Line DedupeRemove duplicate lines from a text block.
• Line ReverseReverse the order of lines.
• Word CountCount words, characters, lines, sentences, and paragraphs.
• Text ReverseReverse all characters in the text.
• Text TrimTrim leading and trailing whitespace from each line.
• Remove Empty LinesDelete all blank lines from a text block.
• Number LinesPrefix each line with its sequential line number.
• Prefix LinesAdd a custom prefix string to every line.
• Suffix LinesAdd a custom suffix string to every line.
• Join LinesJoin multiple lines into one with a configurable separator.
• Extract EmailsExtract all email addresses from any block of text.
• Extract URLsExtract all URLs from any block of text.
• Extract NumbersExtract all numeric values from any block of text.
• Split & DiffSide-by-side visual diff of two text inputs with line-level highlighting.